| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 1 |
0%
|
|
| 1998 | 188 |
4.1%
|
|
| 1999 | 419 |
9.2%
|
|
| 2000 | 1556 |
34.3%
|
|
| 2001 | 1008 |
22.2%
|
|
| 2002 | 954 |
21%
|
|
| 2003 | 414 |
9.1%
|
|
| Sysmiss | 1460 |